Boiler-feeding mechanism.



No. 772,410. I PATENTED- 0071?. 18, 1904. E. F. FIELD.

BOILERFEEDING MECHANISM.

. APPLICATION FILED OCT. 20, 1903.

no MODEL.

- WITNESSES? Y L U ITED STATES Patented October 18, 1904.

PATENT 7 OFFICE.

EDWIN FFIELD, LEWISTON, MAINE.

BOILER-FEEDING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 772,410, dated. October18, 1904.

Application filed October 20, 1903.

dent of Lewiston, in the county of Androscoggin and State of Maine, haveinvented certain new and useful Improvements in Boiler- FeedingMechanism; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to an improved boilerfeeding mechanism,',moreparticularly adapted for use on motor-vehicles, the object of theinvention being to provide mechanism for giving to the boiler a largeimmediate water-supply, feeding automatically cold water at the bottomof the boilerto replace water vaporized by the generation of steamtherein, and prevent the necessity of the constant watching of thewaterlevel in the boiler and consequent danger due to the fall of Waterthereon, and dispensing with the necessity for a frequent operationofthe force-pump.

A furtherobject is to provide an improved feed tank or tanks between thewater-reservoir and boiler in direct communication at top and bottomwith the boiler and into which tanks water from the reservoir is forcedby a pump or other approved means; and a further object is to provideimprovements of this character wherein the feed tanks or tank can besupplied with water without recourse to the reservoir and pump.

WVith these objects in view the invention consists in certainnovel'features of construction and combinations and arrangements ofparts, as will be more fully hereinafter described, and pointed out inthe claims.

In the accompanying drawings, Figure 1 is a perspective viewillustrating my improvements.v Fig. 2 is a view in vertical section onthe line w w of Fig. 1; and Fig. 3 is a view in elevation, partly insection.

1 represents a boiler which may be of an approved construction, butpreferably of that type known as tubular to give to the boiler themaximum amount of heating-surface, and 2 represents an ordinary waterreservoir or $erial No. 177,765. (No model.)

tank, located, as shown, adjacent to the boiler or disposed somedistance therefrom, as preferred.

3 3 indicate my improved feed-tanks, which are constructed, preferably,as shown, with inclosing pipes 4t, surrounding tie-rods 5, which latterconnect the tank-heads, to give to the tanks sufficient strength towithstand the boiler-pressure. The tanks 3 are both connected at theirtop with the top of boiler l'by pipes 6 for conveying steam from theboiler to the tanks, and valves 7 are located in said pipes, whichpermit the steam-pressure to be shut olf when desired. The bottom ofsaid tanks 3 are connected with the bottom of boiler 1 by means of pipes8, having a downward coil or bend 8 therein, and are provided withvalves 9 to shut off the passage of water, all for a purpose which willhereinafter appear. s

A suitable pump 10 is provided for forcing water from reservoir 2through pipes 11 into tanks 3, and funnel-shaped inlet-ports 12 arelocated on the top of tanks closed by valves 13.

" The operation of my improvements is as follows: The tanks 3 and boiler1 are filled to the desired level either by means of pump 10 or throughinlet-ports 12, and, as will be readily understood, the water will finda common level in the tanks and boiler. As the boiler is heated togenerate steam therein the steam will pass through pipes 6 into tanks 3,maintaining a uniform pressure in the tanks and boiler, and owing to thewell-known fact that hot water always rises and never descends the coldwater from tanks 3 will feed through pipes 8 into the bottom of theboiler to replace the losses by evaporation and always maintain auniform level in the boiler and tanks, and owing to the downward coil ortwist 8. in said pipes 8 there can be no return from the boiler to thefeed-tanks due to the principle above mentioned. It will thus be seenthat the boiler is provided with a large immediate supply automaticallyfeeding to the boiler and insuring a long run of the engine Withoutattention. If from any reason the pump 3and are normally should notwork, as is often the case, valves 7 and 9 can be closed, cutting offall communication with boiler 1 and valve 13 can be opened, water beingthen supplied by hand through the funnel shaped inlet ports 12. Valve 13can then be closed and valves 7 and 9 opened, when the boiler will beagain ready for a long operation.

By providing my improvements the necessity for constantly watching thewater-leve in a boiler is obviated, for the tanks 3 maintain animmediate supply which will last for a long period and relieve theoperator of a great amount of worry he has been heretofore subjected toand will also prevent the very frequent accidents due to a too greatfall of water in the boiler.

A great many slight changes might be made in the general form andarrangement of the parts described without departing from my invention,and hence I would have it understood that 1 do not restrict myself tothe precise details set forth, but consider myself at liberty to makesuch slight changes and alterations as fairly fall within the spirit andscope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. The combination with a boiler, of a feedtank, a pipe connecting thetank and boiler at their upper ends, a pipe connecting the boiler andtank at their lower ends, said last-mentioned pipe having a coil thereindepending below the remaining portion of the pipe, and means forsupplying water to saidtank.

2. The combination with a boiler, of a feedtank, a pipe connecting thetank and boiler at their upper ends, another pipe connecting them attheir lower ends, valves in said pipes, a valved inlet-portcommunicating with the top of the tank, said port being open above thevalve, a water-reservoir, and means for forcing water from the reservoirinto the tank.

3. The combination with a boiler, of a feedtank, a valved pipeconnecting the top of the boiler and tank, a valved pipe connecting thelower ends of the tank and boiler, and having a downward coil or bendtherein projecting down below the bottom of the boiler, and means forforcing water into said tank.

4. The combination with a boiler, of feedtanks adjacent thereto andhaving a combined capacity greater than the capacity of the boiler,pipes connecting the upper ends of both of said tanks directly with theboiler for the passage of steam from the boiler to the tanks, pipesconnecting the lower ends of the tanks with the boiler to convey waterfrom the tank to the boiler, and maintain a uniform level in the tanksand boiler, a water-reservoir, and means for forcing water from thereservoir into the tanks.

5. The combination with a boiler and a water-supply reservoir, of afeed-water tank communicating at its respective ends with respectiveends of the boiler, means for forcing water from the supply-reservoir tothe tank, and an auxiliary water-supply port for the tank, independentof the \vater-reservoir.

6. The combination with a water-reservoir and a boiler, of a series offeed-water tanks located in proximity to said reservoir and 'boiler,each of said tanks communicating at its respective ends with therespective ends of the boiler, a common water-supply pipe between thetanks and the reservoir and auxiliary water-supply ports for the tanks.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

EDlVlN 1*. FIELD.

Witnesses:

A. H. NELSON, A. P. NORTON.

